Sensorless control system for permanent magnet synchronous machine
US10658955B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2017 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | May 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a sensorless control system for a permanent magnet synchronous machine. The sensorless control system includes a counter electromotive force estimation unit configured to estimate a counter electromotive force using a phase voltage reference applied to an inverter and a phase current applied from the inverter to the permanent magnet synchronous machine, and a speed estimation unit configured to estimate an angular velocity and an electrical angle of a rotor of the permanent magnet synchronous machine, and the counter electromotive force estimation unit according to one embodiment of the present disclosure may maintain robust performance at a low speed by modifying some portion of a conventional Luenberger observer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.